Deformation joint suitable for connection of pedestrian overpass or corridor and existing structure

A deformation joint suitable for connection of a pedestrian overpass or a corridor and an existing structure comprises a pedestrian overpass or corridor interface end provided with a surface building surface layer and a lower bridge body structure, an existing structure interface end and a to-be-connected gap reserved between the two interface ends, the bridge body structure is longer than the building surface layer by a certain length to form a bridge body structure table top and forms an accommodating long groove with the end surface of the building surface layer along theto-be-connected gap, and a double-lug plate bottom plate is fixed on the table top of the bridge body structure and is connected with the double-lug plate; a plurality of connecting steel plates are arranged along the full length of a to-be-connected gap, and the adjacent connecting steel plates are connected into a whole through thin connecting steel sheets; one end of the connecting steel plate is lapped on the interface end surface laye